userlibandfileserver/fileserver/sfsrv/cl_clamp.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 09:24:54 +0200
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// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the License "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// f32\sfsrv\cl_clamp.cpp
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// 
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//
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#include <f32file.h>
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EXPORT_C TInt RFileClamp::Clamp(RFile& aFile)
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/**
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	Clamp the supplied file and store the resulting cookie in this object.
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	@param	aFile			File to clamp.
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	@return					Symbian OS error code.
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 */
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	{
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	return aFile.Clamp(*this);
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	}
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EXPORT_C TInt RFileClamp::Close(RFs& aFs)
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/**
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	Unclamp the file which was clamped with this object.
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	It is safe to call this function a handle that was not
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	successfully opened.
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	@param	aFs				File server session which was used to
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							generate this clamp cookie value.
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	@return					Symbian OS error code.
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 */
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	{
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	TInt r = KErrNone;
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	TBool opened = !(iCookie[0] == 0 && iCookie[1] == 0);
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	if (opened)
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		{
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		r = aFs.Unclamp(*this);
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		if (r == KErrNone)
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			*this = RFileClamp();
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		}
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	return r;
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	}
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